We have been distributing OleAut32.dll and olepro32.dll (and other DLLs that are in the VB6 Runtime package) for many years now but Windows 7 has a newer version of those. And we were forcing our VB6 app to use our copies of them.

I removed all of our standard DLL's (including the above) and the app runs just fine, so they're all included with Windows 7. And it looks like we just need the newer version of OleAut32.dll (if reinstall the app and replace OleAut32.dll with the new one from Win 7 it works fine)

It occurs to me that some of those files (like even the msVBvm60.dll) come pre-installed so we're much better off just not installing those files. (Or we may have to bite the bullet and do it the old fashioned way (:-) and install to the system and use version checking. It's been nice to not have any DLL hell for the last 10 years or so. But I'm not sure